Molding machine



Mar' 201 P. FRUs ET AL MOLDING MACHINE e iV) Filed Dec.

Mar. 20, 1923. 1,448,924

P. FRlls ET Al.

MOLDING MACHINE Filed Dec. 7, 1921 3 sheets-sheet 2 Mar. 20, 1923.

P. FRns lar AL MOLDING MACHINE Filed Dec 7, 1921 5 sheets-sheet 5 Patented Mar. 20, 1923.

UNITED STATES PATENT OFFICE.

@PETER FRIIS AND HENRY WAHLN, OF RACINE, WISCONSIN, ASSIGNORS T0 THE BEARDSLEY & PIPER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLI- NOIS.

MOLDING MACHINE.

Application tiled December 7, 1921.

To all fw hom it may concern:

Be it known that we, PETER Fans and HENRY A. lVAHLEN, both citizens of the United States, and residents of Racine, in the county of Racine and State of Wisconsin, have invented certain new and useful Improvements in Molding Machines, of which the following is a full, clear, and exact description.

The invention relates to molding machines. In using machines of the type eX- emplified in the patents to Beardsley and Piper No. 1,309,833 4and No. 1,335,642 for making` some moulds, it has beenfound advantageous to dispense with all of the inclined chutes for feeding sand to the projector, particularly where it is desired to feed sand in great volume to the projector, for example, 1n making moulds for pianoplates. One object of the invention is to provide an improved machine to meet this condition. Another object of the invention is to combine with a riddle, a feed-belt which is adapted to quickly remove the riddled sand from the riddle. Another object is to provide a molding machine of the aforesaid type of improved construction.

The invention consists in the several novel features hereinafter set forth and more particularly definedby claims at the conclusion hereof.

In the drawings: Fig. 1 is a side elevation of a machine embodying the invention. Fig. 2 is a plan. Fig. 3 1s a vertical longitudinal section of the sand feeding apparatus. Fig. 4 is a section taken on line 11--4 of Fig. 3. Fig. 5 is a section taken on line 5-5 of Fig. 3. Fig. 6 is a longitudinal section through the projector. Fig. 7 is a transverse section through the projector.

The invention is exemplified in a structure comprising a mast or vertical support 10 on the upper end of which is journalled for horizontal rotation a socket 13. to which a horizontal tubular jib 12 is secured. An arm 14 is suitably pivoted to the distal end of the jib so as to swing laterally relatively thereto, and a sand projector comprising a casing or stator 15 and a rotor 16 provided with a shear and projector-blade 17 which may be of the construction set forth in the aforesaid Patent No. 1,309,833. The rotor 16 is fixed to a shaft 18 which extends longitudinally through the arm 14 and is driven serial No. 520,493.

work which is rigidly secured to turn horizontally with the jib 12. Said framework comprises standards 23 and brackets 24 in which roller 21 is journaled, and supporting members 25 provided with brackets 26 in which the roller 22 is journalled. The parts of this framework are rigidly secured together to support the rollers so they will swing laterally with the jib 12. A roller 22 is provided to support the medial portion of the belt 20 and is supported by a member 22a fixed tQthe framework 23, 25. A chute 27 is fixedly secured to the upper ends of members 23 and 25, s0 that it will also move with the jih 12 and belt 20. A stationaryv chute 28 is adapted to deliver sand into that i slightly inclined downwardly towards the discharge end of the belt 2U, comprises a sifting element 29 and a frame 30. One end of the riddle is supported by arms 31 which are pivotcd at 32 iu bearings 33 which are fixed to the elongated chute 27. The other end of the riddle is reciprocably guided between rollers 34 which are mounted in the chute and on the sides thereof. Chute 27 is elongated to extend longitudinally over the feed belt 20 so that any material which will become sufliciently disintegrated to. pass through the screen will fall onto the belt 20. The lower portion of chute 27 is provided with a tapered portion 27L so that a riddle considerably wider than the belt may be used and so that the riddle will be of suilicient capacity to supply a large volume of screened sand to the projector. Arms 31a are rigid with arms 31 and mechanism is provided for operating said arms to vibrate the riddle longitudinally in the chute 27.

This mechanism comprises an electric motor 34 mounted on a bracket 35 which is fixed tosocket 13 and is horizontally rotatable with the jlb and other parts carried thereby: a shaft 36 driven by said motor and provided with a worm-gear 37 in a gearcasing 38 which meshes with a gear 39 also enclosed in said case; a sprocket-wheel 4() secured to be driven by the shaft 41 of gear 39; a sprocket-chain 42 driven by said sprocket wheel; a sprocket wheel 43 driven by said chain and fixed to the shaft 44 ot the roller 21; cranks 45 on shaft 44 and pitmen 46 connected to said cranks and to arms 31, The motor 34 and reducing gear and chain drive 4U, 42, 43 also serve to drive the sand-feeding belt 20. r1`he sand fed to the riddle frequently contains scrap castings and these. as well as the lumps ot' sand which are not disintegrated, are discharged from the end ot' the sieve 29 into a crossduct 48 with an inclined bottom 49 which discharges the material at one side of the belt 2() and into a chute 50 which is secured to the framework 23, 25 on the jib. box 51 secured to the jih 12 receives the material from the chute 5l). The structure thus far described exemplifies mechanism for feeding sand which is mounted to rotate horizontally with a jib and comprises au endless belt and a riddle above the belt for deliveringl sand in great volumes onto the belt.

The discharge end of belt 2U and roller are disposed so the riddled sand `from said belt will be discharged into a hopper 54 which is mounted on arm 14 and movable therewith, being secured thereto by supports 55 and 56. The bottom of chute 54 is open so the sand will fall upon an endless belt 5T which passes around rollers 58 and 59. both of which are suitably supported ou, and to swing horizontally with, the arm 14. (`hutc 54 and the roller 58, which is disposed adjacent the receiving end of the belt 5T, are disposed above and near the axis of the pivot 14a around which the arm 14 swings relativel to the jib 12, so that the hopper 54 and velt 57 will receive sand from the belt 20 in all of the angular positions of the arm and the jib. The discharge end of belt 57 delivers the sand into the projector, as exemplified in our said Patent No. 1,335,642. Belt 57 is driven to continuously feed sand to the projector by mechanism comprising a bevelled gear 6U on the shaft 18 between the motor 19 and the rotor 16, a bevelled gear 61 meshing with gear 60, an idler 62 which meshes with a gear 63 rigid with gear 61 and with a gear 64 fixed to the shaft of roller 58. This mechanism is suitably mounted on a case 65 which forms a part of the arm 14 and is secured to the case of the motor 19. This construction exemplifies an arm, on the distal end of which the projector is secured` and a belt for feeding sand to the projector from a belt which is movable relatively to the arm and with a pivoted jib.

In operation. the sand is delivered through chute 28 onto the receiving end of the riddle in chute 27. The latter is vibrated by the mechanism driven from motor 34, so that the sand will be sifted thereby and fall through the chute and onto the belt 20. The

deposit of thc sand trom the riddle will be gradual as it becomes disintegrated in passing over the riddle. Any lumps or scrap with the sand will be discharged from the outer end ot' the riddle into the duct 48 so that they will not be delivered to the projector. The sandideposited on the belt 20 will be discharged at roller 22 into the hopper 54 which will guide it onto the receiving end of the belt 57 which "twill convey the sand to the projector. The? latter, being operated at high speed fromthe motor 19, will forcibly project wads of sand sheared from the stream discharged from beltV 5T into a flask beneath the projector, as Well understood in the art. rThe pivotal movement of the jib 12 and arm 14 and the relative movement between them permit the projector to be moved over and project sand into all portions ot' a fiask, to properly form and pack a mould.

The receiving end of chute 27 and the riddle therein are disposed over the axis of they pivot between the jib 12 and support l0, so that they will receive sand from the stationary hopper 28 in all positions of the jib 12.

The invention exemplifies a molding machine in which the sand projector is supplied with sand by mechanism comprising a plurality of sand-feeding belts which are mounted to move with relatively movable supporting members, one belt being adapted to deliver sand to the other belt. The invention also exemplifies a molding machine in which a riddle is adapted to deposit the sifted sand onto a belt and which operates in an elongated chute which is movable horizontally with the belt so that it is necessary to vibrate the chute.

The invention is not to be understood as restricted to the details set forth,` since these may be modified within the scope of the appended claims, without departing from the spirit and scope of' the invention.

Having thus described the invention, what l claim as new and desire. to secure by Letters Patent, is:

1. In a molding machine, the combination of a plurality of horizontally swinging members, one of which is pivoted to the other, a. sand-projector on one of said members, a plurality of sand feeding belts mounted to move with said members respectively, one of which is mounted to deliver sand to the projector, mechanism for driving said belts, and mechanism for operating said projector.

2. In a molding machine, the combination of a plurality of horizontally swinging members, one of which is pivoted to the other, a sand projector on one of said members, a plurality of sand feeding belts mounted to move with said members respectively, one of which belts is mounted to deliver sand to the other, the latter being mounted to deliver sand to the rojector, and mechanism for driving said be ts.

3. In a molding machine, the combinationof a plurality of horizontally swinging members, one of which is pivoted to the other` a sand projector on one of said members, a plurality of sand feeding belts, mounted to move with said members respectively` one of which belts is mounted to deliver sand to the other inall angular positions.` the latter being mounted to deliver sand to the projector, mechanism for driving said belts, and mechanism for operating said projector. Y,

4. In a: molding machine, the combination of a pluralityv of relatively movable supporting members, a sand projector mounted on one of the members, a plurality of sand feeding belts mounted on the members respectively, a riddle over one of said belts, mechanism for operating the riddle, mechanism for driving the belts, and mechanism for o )erating the projector.

5. n a molding machine, the combination of a plurality of horizontally swinging supporting members, a sand projector mounted on one of the members, a plurality of sand feedin belts mounted on the members respective y, a riddle over one of said belts, mechanism for operating the riddle, mechanism for driving the belts, and mechanism foroperating the projector.

6. In a molding machine, the combination of a plurality of horizontally swinging supporting members, a sand projector mounted on the end of one of the members, a plurality of sand feeding belts mounted on the members respectively, a vibratory riddle over one of said belts, mechanism for operating the riddle, mechanism for driving the belts, and mechanism for operating the projector.

7. In a molding machine, the combination of a vertical support, a horizontally swinging arm pivoted thereto, a second horizontally swinging arm pivoted to the first arm, a sand-projector, means for operating the projector carried by the second arm, two sand conveyor belts, one carried .by

each arm, that on the lirst arm delivering sand to the second belt in all angular positions of the two arms to each other, the second conveyor belt delivering sand tothe projector, and mechanism for driving said belts.

8. In a molding machine, the combination of a vertical support, a horizontally swinging arm pivoted thereto, a second horizontally swinging arm pivoted to the first arm, a sand-projector, means for operating the projector carried by the second arm, two sand conveyor-belts, one carried by `each arm, that on the first arm delivering sand to the second belt, in all angular positions of the two arms to each other, the second conveyor belt delivering sand to the projector, mechanism for driving said belts, a vibra.- tory riddle mounted on one of said arms and over one of the belts, and mechanism for operating the riddle.

9. In a molding machine` the combination of a sand projector. supporting means for the projector comprising a movable member, means to feed sand to the projector comprising a belt mounted to move with said meinber, a riddle also mounted on said member and adapted to discharge sand to the belt, mechanism for operating the riddle, and mechanism for drivingr the belt.

10. In a molding machine, the combination of a sand projector, supporting means for the projector com rlsing a pivoted member, means to feed san to the projector .comprising a belt mounted to swing with said member, a riddle also mounted on and to move with said member and adapted to discharge sand onto said belt, and mechanism for operatin the riddle and for driving the belt.

1l. na molding'machine, the combination of a sand projectorsupporting means for the projector comprising a movable member, means to feed sand to the projector comprising a Abelt mounted to move with said member, alriddle also mounted on said member, mechanism for conjointly operating the riddle-and driving the belt.

12. ln a moldlng machine, the combination of a horizontally movable member, a movably supported sand projector, means to feed sand to.. the projector comprising a chute fxedly mounted on said member, a vibratory riddle in said chute, mechanism for operating said riddle, and mechanism for operating the projector. f

13. In a molding machine, the combination of a horizontallymovable member,' a movably supported `sand projector, means to feed sand to the projector comprising a chute fixedly mounted on said member, a vibratory riddle in said chute, said chute and riddle being wider than said belt, mechanism for operatin said riddle, and mechanism vfor op. erating t e projector.

14. I n a molding machine, the combination of a horizontally movable member, a movably supported sand projector, means to feed sand to the projector comprising a chute fxedly mounted on said member, a vibratory riddle in said chute, said chute and riddle being wider than said belt, the chute having a constricted lower portion to guide the sand to the belt, mechanism for operating said riddle, and mechanism for operating the projector.

15. In a molding machine, the combination of a horizontally movable member, a movably supported sand projector, means to feed sand to the projector comprising a chute ixedly mounted on said member, a vibratory riddle in said chute, means to conduct the material retained by the riddle to one side of the belt, mechanism for operating said riddle, and mechanism for operating the proA jector.

16. In a molding machine, the combination of a horizontally swinging member, a movably supported sand projector, means to feed sand to the projector comprisingr a belt movable with said member, a chute lixedly mounted on said member, a vibratory riddle in said chute adapted to deposit sand on the belt, mechanism for operating said riddle and said belt, and mechanism for operating the projector.

17. In a molding machine, the combination of a plurality of horizontally swinging members, a sand projector on one of said members, means to feed sand to the projec- -tor comprising a belt movable with one of said members, a chute fixeclly mounted on said latter member, a vibratory riddle in said chute and adapted to deposit sand on the belt, mechanism for operating said riddle and said belt, and mechanism for operating the projector. t

18. In a molding machine. the combination of a vertical su port, a horizontally swinging arm pivote thereto, a second horizontally swinging arm pivoted to the first arm, a sand projector on said second arm, means for operating the projector carried by the second arm, two sand conveyor belts, one carried by each arm, that on the tirst arm delivering sandA to the second belt in all angular positions of the two arms to each other. the second conveyor belt delivering to the sand projector, and separate mechanlsms for driving said belts.

19. In a molding machine, the combination of a vertical support, a horizontally swingin arm pivote thereto, a second horizonta y swinging arm pivoted to the first arm, a sand pro'ector on said second arm, means for operating the projector carried by the second arm, two sand conveyor belts, one carried by each arm, that on the rst arm delivering sand to the second belt in all angular positions of the two arms to each other, the second conveyor belt delivering to the sand projector, mechanism for driving said belts, a vibratory riddle mounted on one of said arms and over one of the belts, and mechanism for conjointly operating the riddle and driving one of the belts.

PETER FRIIS. HENRY A. WAHLEN. 

